What is the Difference Between Koi and Carp?

The main differences between koi and carp are their appearance, life cycle, ecological impact, and range and distribution. Here are the key differences:

1. Appearance: Common carp have brown or gold bodies, while koi fish have exotic color patterns and variations. Koi fish also have larger, more curved, and more symmetrical scales compared to common carp.
2. Life Cycle: Common carp usually carry out their life cycle in the wild, whereas koi fish are a popular pet and have been selectively bred for centuries.
3. Ecological Impact: Both fish can threaten the environment by stirring up sediments as they forage for food. However, koi fish wouldn't exist without human interaction.
4. Range and Distribution: Koi fish occur naturally in parts of Asia and throughout the Caspian, Black, and Aral Seas. Common carp can be found in large populations throughout North America, Australia, and New Zealand, as well as in Asia and Eastern Europe.

Koi fish are descendants of common carp and were developed through selective breeding in Japan during the 19th century. As a result, koi fish have different colors, body shapes, and spawning habits compared to common carp.

Comparative Table: Koi vs Carp

Koi and carp are both members of the Cyprinus carpio species, but they have been selectively bred for different traits over many generations. Here is a table highlighting the differences between koi and carp:

While koi are known for their diverse and vibrant color patterns, carp generally have subdued colors and robust bodies. Koi have adapted to living in ponds and are less hardy than carp, which are found in various habitats and are more resilient.